Car truck



June 24 1924.

D. S. BARROWS CAR TRUCK Filed April 25,

152x 5 mus-sheet 2 June 24 1924.

D. S. BARROWS CAR TRUCK 5 Sheets-Sheet 5 Filed April 25 .SZ

June 24 1924,

D. S. BARROWS CAR TRUCK Filed April 25 1921 5 Sheets-Sheet 4 @gaamember, a strut and a tension member coinbined in trussed relation, thesaid tension member being fashioned as a band ot uni- 'toi-m crosssection looped around opposite ends ot the compression member and havingportions ot twisted form extending between the compression member andthe strut.

There are other features of the invention residing in details ofelements and in partie ular combinations ot parts, all as willhereinatter appear.

ln the drawings chosen for the purpose oft illustrating theinvention,the scope whereoic is pointed out in the claims,--

Figure 1 is a view, partly in side elevation and partly in verticalsection, ot a car truck embodying theY invention, the truck wheels beingindicated in dot and dash lines, a portion ot the bolster being brokenaway and certain ofthe bolster springs being omitted.

Figure 2 is a plan view ot the truck side frame illustrated in Fig. 1,the journal boxes being omitted.

Figure 3 is a detail sectional view on the line 3 3, Fig; 1.

Figure 4 is a detail sectional view on the line 4 4, Fig. 2, a portiono'l the neighboring journal box` being also shown.

Figure 5 is a detail inverted plan view ot the lower end ot the centercasting or strut member of the trussed side trame illustrated in Figs. 1and 2.

Figure 6 is a detail sectional view on the line 6 6, Fig. 1.

Figure T is a detail'sectional view on the line 7 7, Fig. 1.

Figure 8 is a View corresponding to Fig. 4, but illustrating a modifiedtorni ot construction.

Figure 9 is a view, partly in side ele? ration and partly in verticalsection, ot a modified torni o't' car truck embodying my invention, thetruck wheels being indicated by dot and dash lines, a portion ot thebolster being broken away and certain ot the bolster springs beingomitted.

Figure 10 is a View, partly in plan and partly in horizontal section, otthe truck side trame illustrated in Fig. 9.

Figure 11 is a detail sectional view on thc line 11 1l, Fig. 9.

Figure 12 is a detail sectional view on the line 12 12, Fig. 9.

Figure 13 is a detail view in inverted plan of the lower central portionot the side trame shown in Fig. 9.

Figure 14 is a detail sectional view on the line. 14 14, Fig. 9.

Figure 15 is Va view, partly in side elevation and partly in verticalsection, ot a modilied form of carv truck embodying the invention', the*truck wheels being indicated by dot and dash lines, a portion of thebolster being broken away and some ofthe bolster springs being.-omitted,

Figure 16 is a view, partly in plan and partly in horizontal section, olthe truck side 'trame illustrated in Fig. 15, the bolster and bolstersprings being omitted and a portion of the spring plank ot the truckbeing broken away.

Figure 17 is a sectional view on the line 17 17, Fig. 16.

ln the drawings,-

1 indicates the wheels of a car truck. The journal ends ot the axles(not shown) upon which the truck wheels are mounted cooperate withjournal boXes 2 which may be ot' any usual or desired form, but which,as shown, are preferably connected to the edjacent side trame truss byjournal box bolts 3 in a well known manner.

Fach ot the side frames, which are or may be or" identical construction,involves a plurality of elements combined in trusscd relation, saidelements preferably consisting of a unitary compression member 4, an`integral center casting 5 which tunctions as a strut, and a continuoustension member (i which girdlcs the ends ot the compression member andpasses beneath the lower part ofthe center casting or strut 5. The strutcasting 5 is preferably made of tJ-t'orm, providing truck columns 7which are integrally united at their lower ends by a bolster spring seatS upon which the truck spring` plank 9 rests and to which it is secured.The bolster 10 is guided for vertical movements between the columns 7 otthe center cash ing and is yieldingly supported by bolster sp 1ings 11which are seated upon the spring plank in the usual manner. lt desiredthe columns 7 ot the center' casting or strut may protected trom wear bymeans ot chang plates 12 which are interposed be tween the sides ot thebolster 10 and the respectively adjacent columns T. `When such cli-atingplates are employed therv are preterably constructed ot channel torni(sce Fig. 7) and ray be attached to Vthe respective columns by means ofcountersunk rivets 12E. To relieve these rivets ot shearing strains dueto vertical movements ot the bolster while in contact with either olithe chatiug plates 12, thecolumns 7 ot the strut niember 5 arepreferably provided on their op posed inner faces with spaced ribs orlugs 14 which by engaging the` opposite ends ot' the correspondingchating plates prevent vertical moven'ient o t the latter.

The upper end o't the strut member is suitably secured to thccompression member 4, as for example, by means ot rivets 15, while thelower end ot the strut men'iber is provided adjacent itsV opposite outertaces with curved seats 1b against which corre spondingly spacedportions ot the tension member 6 bear when the parts are in assembledrelation. As shown in Figs. fl and 6, the lower end ot said strutextends besuitable pivot pins 25. Instead tween the spaced portions ofthe tension member 6 so as to prevent the latter from moving toward eachother, while outward separation of the spaced tensionmember bars ispreferably restrained by means of a yoke or clamp member 17 havingupwardly extending arms or lugs 18 between which and the neighboringvertical faces of the strut the spaced portions of the tensionI member 6pass. The yoke 17 may be conveniently secured to the center casting orstrut 5 by means of rivets 19. Such a form of construction providesmeans for operatively combining the tension member and strut in a mannerpermitting the tension member to adjust itself with relation to thestrut when the truck is in service so as to permit an equalization ofthe strains in the tension member.

The center casting 5 is preferably provided adjacent the lower ends ofthe columns 7 with webs or flanges 2() to which journal box tie members21 may be rigidly secured by means of rivets 22. The flanges 20 are`spaced between the curved seats 16 of the strut so that they projectbetween neighboring spaced portions of the tension member 6, thusallowing the journal box tie members 21 to be disposed in verticalalinement with the spaces between neighboring portions of the tensionelement of the truss. Each of the columns 7 of the strut 5 may beprovided adjacent its upper end with a suitable brake hanger bracket 23to which brake hangers 24 are respectively connected by means of ofcasting the brake hanger brackets 23 integral with the strut casting,they may, as shown, be formed as separate castings rigidly connected tothe strut member by means of rivets.

The top arch bar or compression element 4 of the truss mayadvantageously be of pressed steel and formed from a blank or sheethaving parallel sides, such a form of blank being desirable from thestandpoint of economical manufacture. The compression member ispreferably of less depth and greater Vwidth adjacent the strut 5 than atVpoints over the journal boxes adjacent the tension member 6, the crosssectional form V of said compression member being preferably graduallyvaried towards its ends from the strut member. By this means the metalis efficiently disposed to resist the strains to which the structure issubjected in service. At its opposite ends the compression member 4 iscurved transversely to provide seats 26 against which the looped ends ofthe tension member 6 bear. The axes of curvature of these seats are inthe plane 0f the side frame of the truck and pass through the loop ofthe tension member element. As the tension element 6 girdles the ends ofthe compression member 4 without being rigidly connected thereto, thecurved bearing faces 26 permit the compression member to adjust itselfwith respect to the tension member so as to relieve the latter from anysubstantial lateral bending strains.

Suitable fillers or reinforcing castings 27 are interposed between theends of the channel compression member 4 and the respectively adjacentjournal boxes 8. The castings 27, which are suitably apertured toreceive the journal box bolts 3, may be secured to the compressionmember by means of rivets 28 and 29 which, in order to minimize thestrain thereon, may be advantageously located as shown. The rivets 29preferably have their heads flattened on one side so as to engage thetension member 6 and ensure its retention in proper relation to thecurved seats 26 of the compression member.

In order to permit the withdrawal of the journal box bolts 3 at theinner sides of the journal boxes, the compression member is providedadjacent its opposite ends with openings 30 of a size-sullicient topermit the passage of the said bolts.

The tension element 6 of each side frame passes beneath the centercasting or strut member 5 and girdles the opposite endsrof thecompression member 4. It is preferably formed as an integral endlessloop or hoop affording spaced parallel portions or tension members whichoperatively connect each vend of the compressionV member 4 with. the

center casting or strut, the continuous character of the tension memberand its loop form enabling it to be` operatively combined with the strutand with the compression member of the truss without the intervention ofrivets, bolts or other similar connecting means. Y I

The truck illustrated in-Figs. 1 to 7, inclusive, may be assembled inthe following manner: After the center casting or strut 5 and thecompression member 4 have been rivetedtogether, and after thereinforcing castings 27 have been attached to the compression member bymeans of the rivets 28, the looped tension member 6 may be vdropped downover the compression member, its

spaced portions being Vspread apart so as to permit it to clear thespring seat 8 at the lower end of the center casting. The spacedlportions of the tension member 6 are then forced toward each other soas to bring them into assembled bearing relat1on with thecorrespondingly curved seats 16 upon opposite sides of the strut 5. Theslack necessaryto enable the tension member 6 to be brought intoassembled relation to the strut may be vobtained either by bending theouter ends of the compression member 4 downward or by heating thetensionA member until its spaced side portions can be slid into positionbeneath the shelves 16 of the center casting, or a combination of thesetwo modes of assembly may be adopted. lAlfter the two sides of thetension member 6 have been brought into proper engagement with the seatsor shelves 16 the yolrel or clamp member 18 is put in place and rivetedto the lower end of the strut 5. The brake hanger brackets 2? and thejournal boi; tie bars 21 may thereafter be riveted in place and thejournal boxes 3 secured in position by means of the Vbolts 3 which passthrough the respective tie members 21 and the reinforcin5g,` castings27. rlhe reinforcing casting` 3l illustrated in Fig. 8 performs all thefunctions of the reinforcingr` castings 2T heretofore described and inaddition serves to maintain the tension member 6 in assembled relationwith the compression member of the side frame. To this end thereinforcing member 31 is provided with a lug` 32 which overlaps theupper edge of the tension. member 6 where it passes around thecompression inemoer. In respect to the maintenance of the tension memberin proper relation to the compression member of the truss, the lug 32performs the same tunction as the rivet 29 of the constructionillustrated in Fie's. 1 to 7, inclusive. lilith the exception that theaperture 30 in the compression member a is suficiently enlarged toreceive the lug1 32, the compression member of the structure shown inFig. S is preferably of the form heretofore described. In the form of myinvention illustrated in Figs. 9, 10, 11, 12, 13 and le, the truckwheels 1, journal boxes 2, journal box bolts 3, compression member 4,spring plank 9, bolster 10, bolster springs 11, bolster chafingr plates12, and reinforcing castings 9,7 are, as shown, of the same orsubstantially the same construction as the corresponding` parts embodiedin the structure already described. The center casting;- or strut 3B inthis modified form of my invention, is also generally similar to thestrut member 5, but its lower end is slightly modified to provide curvedbearing` faces 34tof width equal to the greatest transverse dimension ofthose portions of the tension member 35 which pass beneath the strut. Atthe outer edges of the respective seats 34s the center casting' or strut33 is provided with flanges 36 which by engaging the neighboringvertical faces of the spaced portions of the tension member preventseparation of the latter. As more particularly shown in Fig. 14;, aportion 37 of the lower end of the strut 33 projects downwardly betweenthe spaced segments of the tension member 35 so as to prevent them from.moving toward each other. The center casting 33 is provided adjacent thelower end of its bolster columns with oppositely disposed verticalflanges 38 which project between the adjacent spaced portions of thetension member of the trussed structure. The webs or flanges 38 permitthe vertical portions 39 of twisted journal box tie members 4:0 to bereadily secured at their inner ends to the $8 by means of rivets 41.

'llhe tension member 35, which passes under the strut 83 and is loopedor girdled around the opposite ends of the compression member Ll, isj'novided with spaced portions which are of twisted form at pointsintermediate of said compression member and said strut. yllhisconstruction enables the tension meinlfer to have an extended bearbothupon the compression member et upon the center casting 33, therebycounieractingr any tendency of the tension member to twist or rock uponthe other members of the truss with which it is coinbined. l'

This form construction is also advantageous in that while allowing thedepth of the truss to be relatively great it increases the clearance ofthe truck side frames above the traclr rails, thereby allowing the truckwheels to be turned down to smaller diameters without the necessity ofso soon insertingr liners over the journal boxes in order to ii'aaintainthe required rail clearance.

Except as hereinafter described the modii'ied form ot' constructionillustrated in Figs. 15, 16 and 17 is or may be the same orsubstantially the same as that shown in Figs. 1 to 7, inclusive, andaccordingly corresponding parts have been indicated by lilre referencenumerals. ln this form of my invention the strut elements of the sideframe trusses are each composed of a plurality7 ot members 112, 12 ande3 instead of being formed as a single casting, while the tension memberfre, instead of being` fashioned as an integrally united endless loop,has the ends of the bar from which it is formed overlapped and rigidlyriveted to the spring seat member of the strut by means of rivets 45.The upper edges of the spaced portions of the tension member de, whichgirdles the comjiression member 4. bear against suit-able seats i6 onthe under snrface of the member i3 of the strutv` and said member 4t?)is provided with a downwardly projecting` portion 47 which extendsbetween the spaced portions of th-e tension member so as to prevent themfrom movinsY toward each other. rThe overlaj'iped ends or the tensionmember are prevented from movins` outwardly away from the bottom of thestrut by means of the. rivets 45, while the portion of the tensionmember te which is on the opposite side of the strutbe restrained fromoutward movement by means of a hipT t8 with which the member 4:3 may beconveniently provided. The members 1-2 of the strut, which form thetruclt columns, are prefemblj.Y secured to the spring4 seat member 43 ofthe strut bv the rivets 49 which the inner end of the journal box tiemembers 21 are secured to the strut.

lll]

1. A truck side irame comprising a plurality of elements combined intrussed relation, said elements involving a compression member, a strut,and an integral tension member formed as a loop.

2. A truck side frame comprising a compression member, a tension member,and a strut interposed between said members, said tension member beingtormed as an endless bar constituting a loop.

3. A truckl side frame comprising a plurality of elements combined intrussed relation, said elements involving a compression member, a strut,and a tension member oi' loop form.

4. A truck side frame comprising a compression member, a strut. andtension resisting means operatively combined with said compressionmember and strut in trussed relation, the ends of said tension resistingmeans being formed as loops passing around said compression member.

5. A trucl side frame comprising a compression member, a strut, andtension resisting. means combined with said compression member and strutin trussed relation, said tension yresisting means being provided at'its opposite ends with loops through lwhich the respectively adjacentends of said compression member project in the direction ot length ofsaid member.

6. A truck side frame comprising a plurality of elements combined intrussed'relation, said elements involving a compression member, a strut,and a tension member, said tension memberbeing provided with a loopwhereby it is adapted to be operatively connected to said compressionmember, and said loop being formed with spaced portions each of which isoperatively connected to said strut independently of the other.

7. A truck side frame comprising a plurality of elements combined intrussedrelation, said elements involving a compression member, a strut,and a tension member having spaced portions extending from said strut tosaid compression member and between which said compression member ei;-tends, said spaced portions being connected by a portion of said tensionmember extending over said compression member.

8. A truck side frame comprising' a plu` rality of elements combined intrussed relation, said elements involving a compression member, a strut,and a tension member operatively connecting said compression member andsaid'strut, said tension member being looped over said compressionmember.

i). A truck side frame involving a com-- pression member, a tensionmember, and a strut interposed between said members, said tension memberbeing non-rigidly connected to said strut so as to permit equalizationof strains in said tension member and'being provided with looped endsgirdling therespective ends' of said compression n'iember.

10.` A truck side frame ini'folving a compression member, a tensionmember, and strut interposed between said members, the ends of saidcompression member being girdled by saidv tension member, and saidcompression member and'saidi tension member being non-rigidly connectedso as to permit said compression member to adjust itself with respecttoV said tension member and thereby relieve said tension member Voflateral bending strains.

11. vA truck side frame involving a ianged compression member, a tensionmember, and a strut seated between the flanges of the said compressionmember and interposed between said member and the tension member, saidcompression member and said tension member being connected withcapability of relative movement permittingA said compression member toadjust itself with respect to said tension member and therebyl relievesaid tension member of lateral bending-strains.` j

12. A truck side frame involvinga compression member, a tension member,and a strut interposed between said members, said tension member beingnon-rigidly connected to said strut, and said compression member andsaid tension member being connected w'vith capability of relativemovement permitting said compression member to adjust itself withrespect to said tension member and thereby relieve said tension memberot lateral bending strain. I

1,3. A truck side frame involving a compression member, a tensionmember, and an interposed strut, said compression member having curvedseats for said tension member, the aXes of curvatureof said seats being"in the-plane of the side frame.

V1A. A truck side frame involving a com'-l pression member, a tensionmember, and a' strut combined with said members in trussed relation,`said compression lmember being` formed with a curved seat 'for saidtension member, the aX'is of curvature of said seat being in the planeof the side frame.

15. A vtruck side frame involving a compression element, a tensionelement, and an interposed strut, portions of said compres-- sionelement being curved transversely of said frame to form seats for saidtension element.

16. A truck side vframe involving a compression element, a tensionelement, and an interposed strut, said compression element having curvedseats for said tension element, the axes of curvature of said seatsbeing at an angle to each other.

17. A truck side frame involving a compression member, a tension member,anda strut interposed between said members, said tension member havingspaced portions, and

said strut extending between said spaced portions of said tensionmember.

18. A truck side frame involving a Vcompression element, a tensionelement having spaced portions, a strut operatively inten posed betweensaid elements and constitnting means for maintaining said spacedportions of said tension element in spaced relation, and means forpreventing` separation of said spaced portions of said tension elementadjacent said strut.

19. A truck side frame involving a compression element, a tensionelement having spaced portions,V a strut operatively interposed betweensaid elements, and journal box tie members connected to said strut invertical alinement with the space between said spaced portions of thetension element.

20. A truck side frame involving a comn pression element, a tensionelement having spaced portions, a strut operatively interposed betweensaid elements, and journal box tie members extending etween said spacedportions: and connected to opposite sides of said strut.

21. A truck side frame involving a compression element, a strut, andtension means vertically overlapping a portion of said strut, saidtension means having spaced portions extending along the lower end ofsaid strut adjacent the opposite outer faces of the latter.

22. A truck side frame involving a compression element,`a tensionelement having` spaced portions, a strut operatively interposed betweensaid elements, and means carried by said strut for preventing outwardlateral displacement of said spaced portions with respect to said strut.

23. A truck side frame involving a compression member, a separatetension member and a strut combined in trussed relation, saidcompression member being of greater depth and less width adjacent itsends than at its center.

24. A truck side frame involving a conipression member, a separatetension men ber, and a strut interposed between said members, saidcompression member being of less depth and greater width adjacent saidstrut than at points adjacent said tension member.

25. A truck side frame ini/'olving a pressed steel compression member, astrut, and a separate tension member, said compression member being ofgreater depth and less width adjacent its ends than at the center andbeing formed from a blank having parallel sides.

26. A truck side frame comprising an independent tension member, a{ianged compression meniber the flanges thereof being downwardlyextended, and a strut combined with said members in trussed relation,said strut fitting Vwithin the flanges of the compression member, saidcompression member being of greater depth adjacent its ends than at itscenter.

27. fr truck side frame comprising a tension member, a compressionmember, and a strut combined with said members in trnssed relation, thecross-sectional form of said compression member at some points beingdifferent from that at others, and the peripheral length of saidcross-sections being equal.

2S. truck side frame comprising a compression member, a strut, and atension member combined in trnssed relation, said tension member beingloo sed over the ends of said compression member and portions of saidtension member between said compression member and said strut being oftwisted form.

29. A truck side Vframe comprising a compression member, a strut, atension member, and a journal box tie member, said tension member beinglooped around said compression member and having spaced portionsoperatively connected to said strut, and said tiemember being oftwist-ed form and cx-- tending between said spaced portions of saidtension member.

S0. A trnck side frame comprising compression member, a strut, a tensionmember, and a journal box tie member, said tension member being loopedaround said compression member and having spaced portions of twistedform operatively connected to said strut, and said tie member bein oftwisted form and extending' between said spaced portions of said tensionmember.

3l. A truck side frame comprising a compression member, a strut, andtension means combined in trussed relation, said tension means involvingspaced elements each of which is of twisted form.

A. truck side frame comprising a compression member, a strut, andtension means combined therewith in trnssed 'elation7 said tension meansinvolving` spaced ele ments of uniform cross section, each of saidspaced elements being of twisted form.

A truck side frame comprising a compression member, a strut, and atension member, said tension member being tormed as an endless bandlooped around'opposite ends of said compression member, portions of saidband being ot twisted form.

A truck side frame comprising a compression memben a strut, and atension member, said tension member being formed as a band of iiiniforincross section looped around opposite ends of said compression member,portions of said band etcndina between said compression member and saidstrut being sp ced and of twisted form.

in testimoni.7 whereof l affix my signature.

BONLD S. BARR-@VVS

